4 in. ABS Backwater Valve



The NDS 4 in. ABS Backwater Valve is designed to protect low areas or basements from the backflow of waste from street sewers. The quick-action flapper allows unrestricted unidirectional flow and features an elastomeric gasket to ensure a watertight seal. It has limited lifetime warranty.

  • ABS is chemically resistant
  • Use to protect basements or low areas from street sewer backflow
  • Outdoor use
  • H x H connection
  • 5 psi maximum working pressure
  • Requires a working temperature of -30 - 140 degrees
  • Quick-action flapper allows an unrestricted, unidirectional flow and is easy to remove and replace
  • Elastomeric gasket in the flapper for a watertight seal
  • Threaded cap is designed for tightening by hand
  • Neoprene gasket in the access cap provides a positive seal
  • Valve hub outlets fit 4 in. DWV pipe
Download Our Manuals

Currently no manuals available for this product. Please check product description or call our sales support team if you have any further queries.



Warranty / Certifications

Homeowner Support & Resource Links

requestaquote Get Free Quotes callnow 888-880-2779